在iOS中保持应用闲置一段时间后，SRWebsocket连接会自动关闭 [英] SRWebsocket connection is closing automatically after keeping app idle for sometime in iOS

问题描述

我正在使用SRWebSocket在iOS中打开Websocket连接.但是，如果有时我使应用程序保持空闲状态，则连接会自动关闭.之后，当我尝试发送任何数据时，websocket连接失败.

I am using SRWebSocket to open a websocket connection in iOS. But if I am keeping the application idle for sometimes, the connection is closing automatically. After that when I am trying to send any data, the websocket connection is failing.

在我手动断开连接之前，是否仍要保持websocket连接的活动状态?

Is there anyway to keep the websocket connection alive, until I manually disconnect?

推荐答案

我们需要间歇性ping服务器(以我为例，每30秒执行一次)，以避免关闭服务器端的连接. /p>

We need to ping the server intermittently (In my case, I do this in every 30 seconds), for avoiding to close the connection from the server side.

- (void)webSocketDidOpen:(SRWebSocket *)webSocket;
{
    NSLog(@"Websocket Connected");

    // Sending autoping to server
    [self startConnectionCheckTimer];
}

// Checking for WSconnection by Sending Scheduled Ping
- (void)startConnectionCheckTimer {
    if (!_timer) {
        _timer = [NSTimer scheduledTimerWithTimeInterval:30.0f
                                                  target:self
                                                selector:@selector(sendPing:)
                                                userInfo:nil
                                                 repeats:YES];
    }
}

- (void)stopConnectionCheckTimer {
    if ([_timer isValid]) {
        [_timer invalidate];
    }
    _timer = nil;
}

- (void)sendPing:(id)sender
{
    [_webSocket sendPing:nil];
}

_webSocket 是我的SRWebSocket对象， _timer 是NSTimer的对象.

Where, _webSocket is my SRWebSocket object, _timer is an object of NSTimer.

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